Update integrity information in package-lock.json

[natsukagami]

This was done with https://github.com/jeslie0/npm-lockfile-fix

Context

npm doesn't do the most stellar job when it comes to specifying the full integrity information (hashes and such)
inside the package-lock.json file. See more details at NixOS/nixpkgs#261137
This makes building the package from a Nix context really hard (the issue above gives one such instance), and
this applies to your repo too :(

What I did

npm-lockfile-fix adds the hash of each package into the lock file. You can verify this all works (and is valid) by just doing
npm install.

Unfortunately this doesn't guarantee that npm won't mess it up again in the future, but I frankly have no idea
what to do until upstream issues get fixed :(